DOI: 10.1016/j.marpolbul.2016.02.016
Scopus记录号: 2-s2.0-84958212087
论文题名: Polychlorinated biphenyls and organochlorine pesticides as intrinsic tracer tags of foraging grounds of bluefin tuna in the northwest Atlantic Ocean
作者: Deshpande A.D. ; Dickhut R.M. ; Dockum B.W. ; Brill R.W. ; Farrington C.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2016
卷: 105, 期: 1 起始页码: 265
结束页码: 276
语种: 英语
英文关键词: Atlantic bluefin tuna
; Metapopulation
; PCB fingerprints
; Trans-nonachlor/PCB 153 ratio
Scopus关键词: Animals
; Discriminant analysis
; Ecology
; Ecosystems
; Fish
; Organic pollutants
; Pesticides
; Polychlorinated biphenyls
; Bluefin tuna
; Contaminant concentrations
; Discriminant function analysis
; Metapopulations
; Organochlorine pesticides
; Polychlorinated biphenyls (PCB)
; Spatial and temporal scale
; Trans-nonachlor/PCB 153 ratio
; Chemical analysis
; chlordane
; chlorphenotane
; organochlorine pesticide
; polychlorinated biphenyl
; tracer
; chlorinated hydrocarbon
; nonachlor
; pesticide
; polychlorinated biphenyl
; water pollutant
; bioaccumulation
; biological uptake
; concentration (composition)
; DDT
; feeding ground
; fish
; juvenile
; metapopulation
; organochlorine pesticide
; PCB
; perciform
; tracer
; animal behavior
; animal tissue
; Article
; Atlantic Ocean
; biomass
; bluefin tuna
; contamination
; discriminant analysis
; feeding ecology
; foraging
; Gulf of Mexico
; habitat use
; juvenile animal
; liver level
; Maine
; Mediterranean Sea
; migration
; muscle level
; nonhuman
; Nova Scotia
; population dynamics
; tuna
; turnover time
; analysis
; animal
; ecosystem
; environmental monitoring
; metabolism
; Mexico
; otolithic membrane
; population dynamics
; procedures
; tuna
; Virginia
; water pollutant
; Atlantic Ocean
; Atlantic Ocean (Northwest)
; Animalia
; Thunnus thynnus
; Animals
; Atlantic Ocean
; Biomass
; Ecosystem
; Environmental Monitoring
; Hydrocarbons, Chlorinated
; Maine
; Mediterranean Sea
; Mexico
; Nova Scotia
; Otolithic Membrane
; Pesticides
; Polychlorinated Biphenyls
; Population Dynamics
; Tuna
; Virginia
; Water Pollutants, Chemical
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Researchers have utilized chemical fingerprints in the determination of habitat utilization and movements of the aquatic animals. In the present effort, we analyzed polychlorinated biphenyl (PCB) congeners and organochlorine pesticides in the samples of juvenile bluefin tuna caught offshore of Virginia, and in larger bluefin tuna from the Gulf of Maine and near Nova Scotia. For a given specimen, or a given location, PCB concentrations were highest, followed by DDTs, and chlordanes. Average contaminant concentrations from fish captured from the three locations were not significantly different; and PCBs, DDTs, and chlordanes correlated well with each other. Trans-nonachlor/PCB 153 ratios in bluefin tuna of eastern Atlantic (i.e., Mediterranean) origin are low compared to the corresponding ratios in fish in the western Atlantic. As the former migrate to the western Atlantic, these ratios gradually turnover due to the accumulation of biomass from forage contaminated with higher trans-nonachlor/PCB 153 ratio reflecting dissimilar use of chlordane pesticides on two sides of the Atlantic Ocean. The trans-nonachlor/PCB 153 ratio indicated that one juvenile bluefin tuna from offshore of Virginia and one large bluefin tuna from Gulf of Maine in the present study originated from foraging grounds in the Mediterranean Sea, and that they have made the trans-Atlantic migrations. The remaining individuals were determined to be either spawned in the Gulf of Mexico or the trans-nonachlor/PCB 153 ratio for the putative Mediterranean bluefin tuna was completely turned over to resemble the ratio characteristic to the western Atlantic. Based on the turnover time for trans-nonachlor/PCB 153 ratio previously determined, the residence time of juvenile bluefin tuna offshore Virginia was estimated to be at least 0.8 to 1.6 years. A discriminant function analysis (DFA) plot of total PCB normalized signatures of PCB congeners showed three separate clusters, which suggested that bluefin tuna from offshore Virginia, Gulf of Maine, and Nova Scotia could have had extended residences and foraging within the areas of capture to be able to sustain the stable signatures of PCB congeners. The DFA cluster results supported the concept of metapopulation theory of spatial ecology comprising discrete aggregates of local populations of bluefin tuna where the desired prey species are likely to be abundant. Despite their highly migratory trait and endothermic advantage of foraging in broader and colder habitats, the movements and mixing across the aggregation ranges related to feeding did not appear to be extensive. Advancement in the understanding of bluefin tuna population dynamics beyond the coarse concept of trans-Atlantic migrations to the metapopulation hypothesis provides a novel exploratory tool in the stock assessment and resource management. As the chemical tracer tags are fortified naturally and document the time- and space-integrated foraging history, they promise to serve as the low-cost alternatives to the high-cost electronic data recording tags employed for addressing the migratory movements of bluefin tuna. Between the different potential chemical tracer tags, a distinct advantage of PCB/pesticide analysis over the otolith micro-constituent analysis is that the muscle tissue of a given individual bluefin tuna can be sampled repeatedly for PCB/pesticide analysis over different spatial and temporal scales in a non-lethal manner. © 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/87127
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
There are no files associated with this item.
作者单位: NOAA Fisheries, Northeast Fisheries Science Center, James J. Howard Marine Sciences Laboratory, Sandy Hook, NJ, United States; Virginia Institute of Marine Science, Gloucester Point, VA, United States
Recommended Citation:
Deshpande A.D.,Dickhut R.M.,Dockum B.W.,et al. Polychlorinated biphenyls and organochlorine pesticides as intrinsic tracer tags of foraging grounds of bluefin tuna in the northwest Atlantic Ocean[J]. Marine Pollution Bulletin,2016-01-01,105(1)